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WHY "$CASE " AND "$xxxx" CAN NOT BE ASSEMBLED BY KEIL51

I use keil51 to compile some .asm files included in my project, but the "$CASE " can not be accept by keil51. I am puzzled!

  • "I use keil51"

    There is no such product!
    I presume you mean the Keil A51 or AX51 Assembler?

    "compile some .asm files"

    .asm are normally assembler files - you cannot compile them!

    Look at the manual - what does it say?

    "CASE (AX51 and A251 only)"

    Are you using AX51 or A251?
    If not, there's your answer!

  • Hi,Andrew Neil :

    Thanks for your answer! Since I am a newhand and also not very clear about the English concept,perhaps I make some mistake in the explanation of the problem. However , your answer is very helpful to me! I really appreciate it. I will be careful!